Portable melting apparatus.



Patented July 3, I900.

N. S. JENKINS.

PORTABLE MELTINGAPPARATUS.

(Application fl1ed Feb. 7, 1900.)

(NoJlodeL) m: uonms Pmns cu. moroumal, WASHINGTON. u. c.

UNITED STATES PATENT FFICE.

NEWELL SILL JENKINS, OF DRESDEN, GERMANY.

PORTABLE MELTING API- ARATUS.

SPECIFICATION forming part of Letters Patent No. 653,007, dated July 3,1900. Application filed February 7, 1900. Serial No. 13 3- No Model- Toall whom it may concern.-

Beitknown that I, NEWELL SILL JENKINS, a citizen of the United States ofAmerica, and a resident of Dresden, in the Kingdom of Saxony, GermanEmpire, have invented certain new and useful Improvements in PortableMelting Apparatus, of which the following is a specification.

This invention refers to improvements in portable melting apparatus, andhas for its object to provide such apparatuswith a device for regulatingand controlling the admission of gas in order to regulate the heat onthe fusing materials especially usedfor dentists purposes.

In my United States Patent No. 585342, dated June 29, 1897, I have shownan apparatus to which the improvements of the present invention shall beapplied. Said apparatus consists mainly, as described and illustrated inmy former United States Patent mentioned above, of a muffle lined insidewith asbestos, open at front, and provided at its bottom with a hole,said muffle resting on a fork-shaped carrier capable of being shifted ona vertical rod or a support into the proper height for working purposes.To that apparatus belongs a melting-ladle provided with a smallprotecting-cover, which ladle is to be inserted into said muffle. Tothat apparatus, furthermore, belongs a gas jet or burner placedunderneath the muffle, the flame of which is directed against the ladleand may be increased by bellows or air-pressure apparatus.

Now this present invention refers to a device in combination with thesaid apparatus for regulating and controlling the supply of gas for thesaid flame. In the annexed drawings I have shown as much of my patentedapparatus as is necessary to explain the present improvements.

Figure 1 shows a side view, and Fig. 2 a

ground plan, of the apparatus.

a is the muffle, open at front, and c is the hole in the bottom of themuffle.

b is the carrier on which the muffle is held and adjusted in properworking height on rod e.

g is a carrier fixed to the muffle for supporting the arm of the ladle.(Not shown in the drawings.)

On the base-plate it, upon which the vertical rod e is fixed, aremounted two pipes,

m for the gas, and n for the air. The two pipes are provided at theirexterior ends with egg-shaped parts m and ,n for the gas and air hose tobe affixed, which lead gas and air under pressure into the two pipes,respec tively. The two pipes run together at the end, Where they arebent in an upward direction underneath the muffle a, the gas-pipeforming at the united part the outer shell and the air-pipe forming theinner core, and these combined pipes are provided at their uppermostends with suitable holes with which they terminate in a cap 0, which isthe burner proper.

'The gas-pipe m isprovided with a cook or valve 19, the handle of which,q, is prolonged, so as to overlie a segmental-shaped scale 1".

If now the operator has adjusted the muffle a to proper height forworking and the stream of gas and air issuing from the burner-cap 0being ignited, he may regulate this flame and its intensity upon thefusing material at will by'adjustin g the admission of gas according toscale by the handle q. The cook or valve 19 may be fully opened in thebeginning of the operation; but as soon as the material may become fusedit is very material that the heat may be modified, so as not to overdothe melting process and to spoil the result of the operation. Theoperator is guided in his regulating action by the scale 1'.

I claim as my invention- 1. The muffle a, of refractory material havinga hole in the bottom and an opening in the front, the carrier 12connected to the muffle and having a hole therein, a verticalsupporting-rod epassiug through the hole in the carrier, and a screw forclamping the carrier and muffle to said rod, in combination with the arm9 pivoted at one side to the muffle so that its free end can be swungaround opposite the opening in the front of the muffle, substantially asset forth.

2. The muffle aof refractory material having a hole in the bottom and anopening in scale, substantially as and for the purposes IO the front,the arm 9 pivoted to said muflie, set forth. and the rod e forsupporting said muflie, in In testimony that lclaim the foregoing as icombination with the pipes m and n for gas my invention I have signed myname in pres- 5 and air a burner at the end of said pipes beence of twowitnesses.

low the opening in the bottom of the nuflie, NEWELL SILL JENKINS. a cock1), in the gas-pipe m, a graduated Witnesses: scale 1' adjacent to saidcock and an arm q HERNANDO DE SOTO,

secured to said cock and extending over said PAUL AREAS.

